Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Wear resistance

Optimizing the Process of Arc-Spraying To Improve Wear Resistance of Crank Shaft

Asmaa Ali Hussein; Abdullah F. Hauier

Engineering and Technology Journal, 2011, Volume 29, Issue 14, Pages 2900-2911

This research studies the factors effecting on coating produced by electrical arcspraying. The studied variables are applied voltage, wire feed rate and spraying distance.In this investigation used wires made from martinsitic stainless steel to coat the bearing of spherical graphite cast iron. range. The mechanical properties of coating such as hardness are used.Limited optimal environments by electric arc
spraying to improve wear rate resistance of crank shaft.In the first stage all samples and metallizing wires were prepared and chemically analyzed. The coating operation was carried in the second stage. Each group of samples was coated in different way with variable spraying factor being considered. In the third stage all samples were
tested using pin on ring wear testing machine. The investigation performed in this work showed that the process variable have a considerable effect on coating quality ,and spraying distance range emerges as the most significant process variables. The
final results showed that the best voltage in this application is between 28-30V, wire feed rate is 100 mm/s, and best spraying distance is about 12-15cm to get a good coating with maximum wear resistance.

Studying Some Mechanical Properties and Wear Resistance of Aluminum - Glass Composites

Engineering and Technology Journal, 2010, Volume 28, Issue 21, Pages 1030-1039

The research is aimed to prepare an aluminum matrix reinforced with window glass particles with weight percentages of (1%,2%,3%,5% and 7%) ,with particle sizes varies from 75-150μm. Composite materials are prepared by using mechanical stir- casting method. The formation of vortex in aluminum melt helps dispersion of glass particles in aluminum melt . Electroless copper coating on glass particles is carried out to improve wetability between glass particles and aluminium melt. Many inspections and tests have been done such as microstructure, hardness inspection, compression test and dry sliding wear test type Pin-on Disk with different loads and at a constant speed and sliding distance
It was found that addition of glass particles coated with copper to pure aluminum increases hardness , compression strength and wear resistance .